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GENERAL DESCRIPTION Kerr plans to operate the Kerr loadout using the best technology currently available to minimize changes in water quality and quantity. Practices to control drainage in the loadout area include stabilizing disturbed areas through grading, diverting runoff, achieving quick - growing stands of temporary vegetation, lining drainage channels with rock or vegetation, and mulching. Practices to control sediment in the loadout area include the use of temporary diversion ditches and a sediment pond. All discharge form the disturbed area will pass through the sedimentation pond located on the north end of the property. See Loadout Area Hydrology Map, (Map 19). The sedimentation pond will be used until revegetation requirements are met and until applicable effluent standards are satisfied. Kerr shall, if necessary, install, operate and maintain additional facilities to further treat discharge water if required to meet applicable limitations. DIVERSION AND CONVEYANCE OF OVERLAND FLOW AWAY FROM DISTURBED AREAS Runoff from undisturbed areas surrounding the Kerr loadout does not normally encroach upon the disturbed area. To assure that this will not happen, temporary berms of two (2) to three (3) feet in height have been constructed around the loadout site as shown on the Loadout Area Hydrology Map. (Map 19). These berms have been built and will be maintained to prevent undisturbed drainage from entering the disturbed area. The elevation of the berms and the railroad track, which serves as a drainage barrier along the west boundary, are adequate to divert outside flow from a 100-year flood as determined from USGS data on the adjacent Illinois River (McCain and Jarrett, 1976). To direct all on-site drainage to the sedimentation pond, the ground surface at the loadout was graded and a temporary diversion ditch was designed and constructed. In addition, an existing 48-inch culvert • drains the southwest portion of the loadout area. The diversion ditch and culvert carry drainage adjacent to the railroad tracks into the sedimentation pond, as shown on the 23-159R Revised - November, 1991